YMtoVGM

Converts YM2149 files to the standard VGM format. The .YM format is most commonly used for Atari ST chiptunes. It's also sometimes used for Amstrad CPC tunes, and theoretically it can hold music from any computer with a YM2149 / AY-3-8910 soundchip.

Requirements

• Python 3
• lhafile (pip install lhafile)

Usage

usage: ymtovgm.py [-h] [-o <output>] [-c <clock>] [-r <rate>] input

positional arguments:
  input                 YM source file

optional arguments:
  -h, --help            show this help message and exit
  -o <output>, --output <output>
                        VGM output file (default is [input].vgm)
  -c <clock>, --clock <clock>
                        Clockspeed for files where it isn't specified (default
                        is 2000000Hz [Atari ST])
  -r <rate>, --rate <rate>
                        Sample rate for files where it isn't specified
                        (default is 50Hz)

Supported YM file types

• YM2
• YM3
• YM3b
• YM5
• YM6

Unsupported YM file types

• YM1, YM4 - Wouldn't be hard to add, but I can't find any files of these types.
• YMT - YM Tracker file. Entirely sample based, and I can't find info on it. Also pretty rare.
• MIX - Also sample based. No info available. Rather uncommon.

Possible future improvements

• Doesn't support Atari ST specific sound effects e.g. digidrums